Improvement in shaft-couplings



H. ALBRECHT.

SHAFT-COUPLING. No.174,177. Patented Feb. 29,1876.

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N- PETERS, PHOTDLHHOGRAIHER. WASHIN n 5 UNITED STATES PATENT Orrron.

HERMAN ALBRECHT, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMEhIT lN SHAFT-COUPLINGS.

Specification forming part of Letters Patent No; 174,177, dated February 29, 1876; application tiled a February 5, 1876.

To all whom it may concern:

Be it known that I, HERMAN ALBRECHT, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a.

new and Improved Shaft-Coupling, of which the following is a specification:

' top view of the jaw or wedge locking-key.

'biinilar letters of reference indicate corre-.

spending parts.

My invention relates to an improved shaftconpling, that locks the shaft securely and has the advantage of coupling shafts of different diameter with equalfacility as shafts of the same diameter.

The invention conslsts of a connecting sleeve or tube with central partition that divides the sleeve into two sections, to each of which the end of a shaft is coupled by means of eccentric jaws or wedges, a main keywith top and bottom tongues, and a longitudinal key-binding bolt. The sleeve has circumferential flanges to protect the nuts of the bolt ends.

1n the drawing, A represents a sleeve or tube for a shaft-coupling, which sleeve has a central partition, a, that divides the interior of the sleeve into two sections The partition 0!. is centrally perforated for theinsertion of the shafts B to be coupled, and the end sections are bored out eccentrically for thecurved jaws or weed 'gesv (J, thattit the 1 space between the shaft and sleeve, and are rigidly locked by a tapering key, D, that is inserted in longitudinal direction between the eccentric jaws to produce their equal clamping on the shaft throughout their entire length. The tapering key D is provided with longitudinal top and tion a.

of the shaftin either direction. The two keys 4' O, that are inserted from the ends of the sleeve and moved toward the partition a, are further D, and fits by a square central shoulder, 1,,

into a corresponding recess, 61, of the parti- "Ihe screw-bolt E is threaded at the ends, and fastened to'the keys by nuts 6, the bolt preventing, in connection with the wedges and key, the rotating of the shaft ends. By

loosening the nuts, the keys may be taken out with the bolt, and thereby the coupling of the -Having thus described my i nvention,I claii Y as new, and desire to secure by Letters Patent- 1. The dividing partition a of the sleeve, having central perforations for the'shaft ends and square recess for the key-binding bolt, substantially as described.

2. The combination of the sleeve and shaft, having longitudinal grooves, the eccentric wedges or jaws, and the tapering key, having top and bottom tongues to produce the rigid clamping of shaft, substantially as specified.

The combination, with the tapering keys,

of the divided sleeve sections, and with the central partition, having square recess of a longitudinal connecting screw-bolt and fastening end nuts, for the purpose set forth.

. HERMAN ALBRECHT.

' Witnesses:

PAUL GoErEL, T. B. MOSHER. 

